Valve grinder



Jan. l5, 1929. 1,699,475

E. E. MILLER VALVE (fr RINDEBl Filed No3.16,192s 4 snags-sheet 1 Jan. 15, 1929. 1,699,475

E. E. MILLER VALVE GRINDEH Filed No?. 1(5,v 1925 4 Sheets-Sheet 2 1P C m41 A Jan. 15, 1929. 1,699,475

E. E. MILLER VALVE GRINDER 1 Filed Nov. 1e', 1993 4 sheets-sheet 5 M mi 31 M fc4 12 7 8 a l 2 im 27 ,I Il'. l 25 26 15 l, v

, l, Il

Jan. 15, 1929.

E. E. MILLER VALVE GRINDER Filed Nov. 16.. 1.92/3 4 Sheets-Sheet 4 EIGJQ.

Patented Jan. 15, 1929. j

rre STATES PATENT OFFICE.

ERWIN E. MILLER, OF FLLERTON, CALIFORNIA.

VALVE GRINDER. Application led November 16, 1923. Serial IiTo. 675,079.

This invention relates to valve grinders means, and showing the spindle in lowered and has for an object to 'providea tool of position. portable character that is adapted to be Fig. 9 is an elevational view vof parts readily attached directly upon and to the shown in Fig. 8 and showing the spindle in block or cylinder of an internal combustion repressed position. 60 engine of the type having poppet valves. Fig. 10 is a plan of a modified form of the Another object is to provide a valve column elevating means. grinder forming a self-contained power unit Fig. 11 is a side elevation showing the and valve operating means. mod ilied elevating means.

Another object is to provide a unitary Fig. l2 is a section on line 12-12 of 65 self-contained; motor-powered valve grinder, Fig. 11. including means enabling a valve-engaging The present invention constitutes a valve element lthereof to be readily adjusted with grinding tool including a base 2 having a respect to the position of the attached valve bifurcated foot portion 2 which is adapted 15 grinder to adapt the tool to various types to be securely fastened as by a bolt B on a 70 of motors, v f plane-face F of an internal combustion en- Another object is to provide means autogine having pocket valves V. In the utilizamatically acting to lift and shift the valvetion of the present tool, a temporary spring engaging element of the toolso as to cause S is inserted under the valve V which is to a relative change of position. of the valve on be ground, and this valve is therefore, when 75 its seat during the grinding process. 4 free, lifted of of its seat A,

Another object is to provide for the ready The base 2 is provided with a post 3 and lifting of the valve-grinding element to upon this there is turnably mounted a column entirely disengage it from the valve being l which is adapted to be shifted along the v ground. post end in a quick extending movement or so Another object is to provide in a selin a small adjusting movement to control the contained, motor-powered valve grinder, pressure of the valve V on its seat A. Theremeans for automatically breaking the elecfore, means are provided for lifting the tric circuit supplying current to the motor column l to its maximum degree with a when the valve-engaging element is'shifted quick action, and means are also provided 85 to the clear position. f formaking a line adjustment of the column. Other objects and advantages will be made Quick and maximum movement vis given to manifest in the following speciication of the the column so as to lift a spindle element 10 embodiments of the invention illustrated in a considerable distance from the valve seat. the accompanying drawings, wherein: and a smaller and line adjustment is pro- 90 Fig. l. is a plan of the tool as applied to vided for so as to regulate the degree of f the head of a motor block. pressure of the spindle 'l0 on the valve and Fig. 2 is a side elevation Vand partial sectherefore of the valve onrthe seat A. tion of the applied tool showing the valve- One form of column adjusting means is 40 engaging element in effective valve-setting shown as including a cam 7 which is turn- 95 and grinding position. j ably mountedv on a fixed trunnion or pin 8 Fig. k3 is a section showing the `motor Fig. 6, forming a part of or attached to the switch parts in circuit closing relation. base 2. This cam isclearly shown in Figs. Fig. 4 shows the motor switch parts in l and 2, as provided with a lug 7a through 4f circuit breaking position. which is threaded an adjusting screw 9, one 100 Fig. 5 is a side elevation and partial secend of which is engageable with a shoulder tion showing the valve-engaging element n 2b which may be formed as apart of the base clearing position, andy showing the tool 2- The effetive vface 0f the cam 7 is discolumn sustained in elevated position. posed toward the contiguous end of the col- Fig. 6 is a section on line 6--6 of Fig. 2, umn 4 and it will be seen that by turning the 105 showing the motor switch parts in detail. A screw 9 it will cause a slight rotation of the Fig. 7 is an elevation and sectional view cam about its axis or pin 8 with ythe result of the column. that the column will be elevated slightly the Fig. 8 is a detailed sectional view Vof the required degree. To effect a quick maxispindle element reciprocating and rotating mum elevation of the column/.1. the screw 9 110 lil lil

,various types of motors, being further facilitated movement to the spindle 10 face of a disc27EL This cam is adapted tointermittently engage' may be utilized as a lever so swing the cam from the position shown in Fig. 2 to the position shown in Fig. 5, with the result that the column 4 will be elevated to the maXimum degree by the cam and Ithus sustainand` hold the spindle 10 a considerable distance above the valve seat.

The spindle end is attached to or forms a part of a mechanism arranged in a gear-box 12 which is adapted to be swung in an are von a pivotal support including a pin 18 in a block 14 which is detachably secured as by a screw/'15 to the outer end of a substantial bracket arm 16. ported in a guideway 4"y provided on or forming a part of the column 4; the. arm 16 being.- disposed at a right-angle to the aXis of the column 4. By this means it will be seen that the gear-box 12 has a swingin movement on the end of the arm 16 and that thearm ,can be radially extended from the column and thus provide for the ready adaptation and adjustment ofthe tool to this adjustment by the adjustment ofthe slotted base12.

'lllesliding arm 16 may be provided with a rackedge 165L engaging a pinion 17 disposed in the guideway 4a and havinga shaft 18 with an adjusting wheel 19, as clearly shown in'F ig. 7.

To obtain a compact power equipment, the tool is provided preferably with an electric motor Mlmountedlon the gear-box 12, and theY motor shaft Fig.y 8, engaging a gear, 2-1v having ashaft 22 gournaled in they gear-box vided with. differentiated gears 23a-nd 24, which are keyed on the shaft.

The gear 23 is shown as meshing with a gear 25, whilerthe -gea r,24;is shown as meshing-*with a gea-i226 which issplined or other-y wisey slidably secured on the spindle 10 so as to provide for relative movement `and drive the spindle,

Asiliere shown, the gear 26 has aslotted hub 26a through which passes a pin 26b keyingfthe gear to the spindle. In the present lcase ,the gear 25 is rotatably mounted on the hub-portion 26a. These gears are rotative atLdifferent speeds by thefgears 23'24.

ltisdesira-ble to provide a reciprocating while it isl` being rotated so that intermittently the spindle 10 will permit thevalve V being; ground to lift from its seat A and-rotate with the spindleto take a newposition whenagainipressed to its seat by the spindle so as toavoidscoring the valve and seat or either. This. inter-l mittent action ofthe spindle is permitted ,by means including a cam 27 provided on a sidesecured on the spindle 10.

a reacting` part of or on the gear 25 and which part is here shown as including a ball This arm is lslidably sup-` isprovidedwith a pinion 20,.

l2, and vbeing prospindle 10 downen to the valveV, and 'this y will be forced to its seat against the action -of the springsu Followingthis the column,

is carefully adjusted bythe screw 9 to bring the desired degree of pressure of the valve onits seat before, duringor` after whiclrthe motor 'Mean be started so as to rotate the spindle. Duringthe operation` of themotor the gears 25,and26 will be constantly driven with theresult that the spindle is running and at the same time itis intermittently .reciprocated as thecanr27 is engaged bythe abutting part 28 rotated with and bythe` gear 25. As the cam engages the abutment 2.8 the spindle 10 is forced back against the spring 30 and the, valve V isz-automatically lifted by the springS. Duringthe rotation of the gear25 the 1abutment28'will be disengaged fronitheca1n27 and thespindle will be again forced down and carry the `valve to its seat.

Vhen the valve is seated there willbe a clearance between the cam 27 and its Co-` operating gear 25, thus ,insuring the-positivev seating ofthe valve.

In Figs. y10, 11 and,l2, a somewhat modified formof elevating means is shown as including acam 7 turnable-on apivot 8X as by means of a lever 9X; `the cam 7X in its lowermostportionis limited by any suitable A stop as apin or shoulder 2X.

'A- slightly modified form of Vmeans for closeadjustment is shown inFig. 11 as including a-,screw 9EL threaded in the head of a column 4 and engaging the rtop of a'post 3.

Ituiswdesirablel to provide means for vautomaticallyI breaking the circuit supplying current to the motori endfand'tothat end terminals T and T Fig. 6 ofthe electric conductors are insulatedin-thebase 2 and are attachedto contact plates P and P,which are of quadrantalform=in plane.' Opposed to these plates is a substantially semi-.circular plateor circuit. closer` C insulated from andfmeunted in a,.hub-portion:o.f the cam 7. vThusas the cam is swung to elevate the standard 4the circuit-.closing plate C shiftstobreak concurrent. contact with the plates P-P, as inFig. 4.v lVhen the cam 7 is swung to lowerthe column 4, then the circuit-closing plate C shifts over into concurrent,y end-engagement with the spaced contactiplatesPi-P" and thus automatically closes the circuit to start and'drive the mo-y llO tor when the valve-engaging spindle is in effective engaging position with the valve V.

Further embodiments, modifications and variations may be resorted to Within the spirit of the invention.

What is claimed is:

1. A valve grinder comprising a a shaft mounted upon said support, two gears of different sizes mounted upon said shaft, a spindle parallel to said shaft, a gear rotatably mounted and meshing with one of the gears on said shaft, said gear being slidably keyed to said saindle, a second gear rotatable aboutthe spindle and meshing with the other gear on said shaft, means providing a projection upon the second gear, a cam secured to the spindle adapted to be engaged by the projection to produce axial movement of the spindle, and means for rotating said shaft.

2. A valve grinder comprising a support, a shaft mounted upon said support, tivo gears of different sizes mounted upon said shaft, a spindle parallel to said shaft, a

gear rotatably mounted and meshing Withv one of the gears on said shaft, said gear being slidably keyed to said spindle, a second gear rotatable about the spindle and meshing With the other gear on said shaft, means providing a projection upon the second gear, a cam secured to the spindle adapted to be engaged by the projection to produce axial movement of the spindle, means for rotating said shaft, and spring means for urging the spindle into a predetermined position.

3. A valve grinder comprising a support, ay shaft rotatably mounted upon said support, means for rotating said shaft, a gear support,

rotatable upon the support having a projecting hub, a spindle slidably keyed to said gear, a second gear rotatable upon the hub, gear means upon the shaft for rotating said gears, a cam carried by the spindle, and means providing a projection upon the second gear adapted to engage the cam so as to produce axial sliding of the spindle.

4t. A valve grinder comprising a support, a shaft rotatably mounted upon said support, means for rotating said shaft, a gear rotatable upon the support having a projecting hub, a spindle slidably keyed to said gear, a second gear' rotatable upon the hub, gear means upon the shaft for rotating said gears, a cam carried by the spindle, means providing a projection upon the second gear adapted to engage the cam so as to produce axial sliding of the spindle, and spring means for urging the spindle into a predetermined position.

5. A valve grinder comprising a support, a shaft rotatably mounted upon said support, means for rotating said shaft, a gear rotatable upon the support having a projectinghub, a spindle slidably keyed to said gear, a second gear rotatable upon the hub, gear means upon the shaft for rotating said gears, a cam carried by the spindle, means providing a projection upon the second gear adapted to engage the cam so as to produce axial sliding of the spindle, and spring means for urging the spindleinto a predetermined position, said spring means bearing upon said cam.

In testimony whereof I have signed my name to this speciigation.

RWIN E. MILLER. 

